Debra, caught in a downward spiral of guilt and substance abuse (following her shooting of LaGuerta), is now in therapy with Dr. Vogel. As a result, Dexter hasn't seen Debra in almost a week.

In this scene, Dexter meets with Vogel, at this cafe on the beach, for an update about what is happening with his sister.

He asks to see Debra, but Vogel discourages him, warning him that it's possible he might lose her forever.

Dex refuses to accept this.

She changes the subject, and asks how his hunt for the Brain Surgeon killer is coming along.

He tells her he crossed three of her former patients off his list, and is now up to A.J. Yates.

Q. What is it actually in real life?

A. A restroom building at a beach.

Q. Where can I find it in real life?

A. This is the same Long Beach restroom building that they used back in episode 6 of Season 5, as the place where Dexter stalked gay murderer Lance Robinson.

It can be found on the beach south of the Belmont Shore area,
off Ocean Blvd, at
Granada Ave, in Long Beach.

That's at approximately 5000 E. Ocean Blvd.

It's at the
southeast end of a large beach
parking lot that begins up near the Belmont Pier and the Long Beach Olympic Pool.
This end of the lot - and the restrooms - are about half a mile southeast
of that pier.

This time, they just used the paved
area nearby as a patio of sorts, by adding a few tables, chairs &
red umbrellas (plus the beach-goer extras in the background, of
course). You don't really see the building itself in the scene.

They also used this
same beach before in the third season, passing it off as a Bimini
beach (with a little help from CGI).

A. In the early seasons, I
usually had to hunt down the locations after viewing the episodes, using
clues from the various scenes. By the now, though, I've developed
a small group of fans, spies & tipsters who kept an
eye out for Dexter filming in their neighborhoods, and let me know in advance when something is about to film there.

Between those reports, my own personal reconnaissance around town, and a
few new resources I discovered, by the time the new first episode airs, I
already know most (but not all) of the filming locations, and only
need to watch the episodes and match up the scenes with the correct
locations.

Rick tipped me to this one. So little is seen in the background of this scene that it wasn't easy to verify, but finally I spotted the oil island Chaffee right off the coast, where it belonged (if you were at that spot on the beach). (Thanks, Rick!).